Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 8 25.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 08/26/2021   06:39:53   (  70.68,  78.97) 08/26/2021   06:41:03  (  70.57,  80.29)   50.37                70
 08/26/2021   07:30:25   ( -70.08,-112.75) 08/26/2021   07:30:40  ( -70.07,-112.80)    2.14                15
 08/26/2021   08:21:08   (  69.95,  54.76) 08/26/2021   08:20:07  (  69.97,  54.70)    2.98                61
 08/28/2021   22:56:17   (  70.99,-165.59) 08/28/2021   22:57:24  (  70.84,-163.43)   80.47                67
 08/28/2021   23:46:44   ( -70.13,   3.12) 08/28/2021   23:47:05  ( -70.12,   3.15)    1.20                21
 08/29/2021   00:37:27   (  69.99, 170.64) 08/29/2021   00:36:32  (  70.01, 170.64)    2.20                55
 08/31/2021   16:03:02   ( -70.12, 119.08) 08/31/2021   16:03:31  ( -70.11, 119.01)    2.87                29
 08/31/2021   16:53:46   (  70.04, -73.48) 08/31/2021   16:52:57  (  70.05, -73.42)    2.91                49
 09/03/2021   08:19:21   ( -70.16,-125.04) 09/03/2021   08:19:56  ( -70.14,-125.05)    2.13                35
 09/03/2021   09:10:04   (  70.03,  42.48) 09/03/2021   09:09:23  (  70.03,  42.43)    1.66                41
 09/06/2021   00:35:38   ( -70.16,  -9.09) 09/06/2021   00:36:20  ( -70.17,  -9.13)    2.52                42
 09/06/2021   01:26:22   (  70.07, 158.35) 09/06/2021   01:25:47  (  70.06, 158.35)    1.78                35